Improvement in door-keys



IUNITED STATES PATENT OFFICE.

CHARLES C. CARPENTER, OF HUNTSVILLE, ALABAMA.

IMPROVEMENT IN DOOR-KEYS.

Specification forming part of Letters Patent No. 112, l23, dated February 28, 1871.

I, GHARLEs C. CARPENTER, of Huntsville, in the county of Madison and State of Alabama, have invented certain Improvements in Keys, of which thefollowing is a specification:

Nature and Objects 0j' the Improremcnts.

Description of the Accompany/ug Drawing.

Figure l is a longitudinal section embodying my improvements. Fig. 2 is a side view ot' pivot, pean, bold, spring, &c. Fig. 3 is a front view ot' the steel spring', as shown at the right hand of Figs. l and 2.

General Description.

A is the key, to which the improvements are attached. B is the peau, attached to the bold J, which Will prevent the introducing of any instrument by which the lock can be picked. C is the pivot upon which the key turns. This pivot is secured to the key by the pin G, passing through the slot h.

D is the steel spring which acts on and forces the steel bolt E into the countersink F.

E is the steel bolt, Which, when forced in the p eountersink F by the steel spring D, secures the improvements tothe peau of the key when it is to be inserted into or taken out ot' the lock. F is the countersink in the main pean. G is the main pean, which holds the pivot C in its proper place. H is the slot in the pivot C which allows the pin G to revolve. I I are rivets which fasten the steel spring D to its proper place. J is the bold to which the pix'ot C is attached, and prevents any attempt to secure the key. K is the socket in the bold of the key A, in which the pivot C is introduced.

Claim.

I claim as my invention- The combination ot' pivot C, pean B, spring D, bolt E, countersink F, pin G, slot H, rivets I I, bold J, and socket K, substantially as and for the purpose hereinbei'ore set forth.

CHARLES C. CARPENTER.

Witnesses v JosEPH B. CARPENTER, THoMAs J. LAMoNs. 

